3. A rod of mass M and length L can slide without friction on two parallel rails as shown in the figure. There is a uniform magnetic field B directed out of the plane. The rails have negligible resistance but the rod has resistance R. Initially the rod is at rest, but at time t = 0 the switch is closed connecting the rod to a battery of Ɛ volts. Find the direction and magnitude of the force acting on the rod at time t = 0.
3. A rod of mass M and length L can slide without friction on two parallel rails as shown in the figure. There is a uniform magnetic field B directed out of the plane. The rails have negligible resistance but the rod has resistance R. Initially the rod is at rest, but at time t = 0 the switch is closed connecting the rod to a battery of Ɛ volts. Find the direction and magnitude of the force acting on the rod at time t = 0.
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Transcribed Image Text:B
v(t) =?
R
Transcribed Image Text:3. A rod of mass M and length L can slide without friction on two parallel rails as shown in the figure. There is a
uniform magnetic field B directed out of the plane. The rails have negligible resistance but the rod has resistance R.
Initially the rod is at rest, but at time t = 0 the switch is closed connecting the rod to a battery of Ɛ volts.
(a)
) Find the direction and magnitude of the force acting on the rod at time t = 0.
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